Improvement in wrenches



NITED STATES PATENT OEEICEO C. G. WEBBER, OF SPRINGFIELD, MASSACHUSETTS,ASSIGNOR TO HIMSELF AND WARREN M. SMITH, OF SAME PLACE.

IMPROVEMENT IN WRENCHES.

Specification forming partof Letters Patent No. 54,471, dated May 1,1866.

To all-whom 'it may concern:

Beit knownthat I,G.U.WEBBER,of Springield, in the county ot' Hampden andState of Massachusetts, have invented a new and useful Improvement inWrenches; and I do hereby declare that the following is a full, clear,and exact description thereof, which will enable others skilled in theart to make and use the same, reference being had .to the accompanyingdra-wing, forming part of this specification.

The drawing is a view of a wrench showing, by a longitudinal section ot'a part ot' the same, the application of my invention.

The object ot my invention is to provide a way for tightening the gripeofthe wrench still more than can he done by the thumb-screw usuallyemployed 5 and it consists in fitting the bar of the wrench to slideinto a socket in the handle thereof, and employing a screw having a neand a coarse thread cut upon it, the former working in the bar and thelatter in a nut in the handle, whereby I am enabled to draw down theouter jaw upon the article taken hold of with great force.

To enable others to understand my invention, I will proceed to describeit.

Arepresents the bar ot' the wrench. B B the two jaws, the latter beingoperated by a screw in the usual way. C is the handle ot the device,which may be of metal or wood, as de-` sired. Into the handle O there ismade a 1ongitudinal slot, into which is fitted to slide the bar A of thewrench.

E E designateascrew-rod, one partof which, E, has a tine thread cut uponit, -which works into a box, a, in the lower end of the bar A,

and the other part, E', has al coarse thread made upon it, which worksinto a box, b, set in the end of the handle. This screw-rod E E' isprovided at the end ot' the wrench with a head, F, by which to operateit.

Another way of .moving the bar A in the handle C may be suggested. Forinstance, a hollow screw could be run on the shank of the wrench and anoutside thread caused to run in the handle, and this would effect thesame end; and indeed other ways might be suggested.

ln using the wrench the jaw B is first screwed tightly up to the articlein the usual way; then to obtain a hetter or iiriner hold the jaw B iscaused to clamp the article tighter, it being made to operate by meansof the head F.

Should it be desired to have the screw E E Screwed harder than thehandwould do it, a small lever can be used, one end of which is to beinserted in holes made in the periphery of the head F. Indeed it can bcscrewed in this way sufciently to Hatten an ordinary gaspipe. Thedifference ofthe two threads of the screw-rod E E gives the power, ascan be readily seen.

What I claim as new, and desire to secure by Letters Patent, is-

The combination otl the jaw B, bar A, screwrod E E', handle C and nut b,and head F, substantially as speci/ded.

C. C. WEBBEB.

Witnesses:

STEPHEN E. SEYMOUR, N. S. BEEBE.

